Every-member warfare requires maintaining our own justification before God.

New Testament survey, Book of Jude.

Instruction, part 2. The enemies of the gospel are insiders who
3) are biblically incompetent and hate those who are competent,
4) practice selective obedience, selfish motives, and subversive tactics for power, and
5) are system cynical, self-appointed, people-pleasing politicians.

New Testament Survey, Book of Jude:

Instruction. Every-member warfare requires correct identification of the enemy. They are “insiders” who teach a false gospel of sensuality and licentiousness.

New Testament survey: Book of Jude. Background and Theme.